Wind Turbine Energy Calculator
Wind Turbine Energy Calculator
Max 59.3% (Betz limit).
| Parameter | Value |
|---|---|
| Rotor Diameter | 3 m |
| Swept Area (A = πr²) | 7.07 m² |
| Average Wind Speed | 5.0 m/s |
| Turbine Efficiency | 35% |
| Power in the Wind | 541 W |
| Usable Power Output | 189 W |
| Annual Energy | 1,659 kWh |
Power Output vs Wind Speed (W)
Summary
What the Numbers Mean
With the defaults (3 m rotor, 5 m/s wind, 35% efficiency), the wind carries 541 W through the swept area and the turbine captures about 189 W — 4.5 kWh/day, 1,660 kWh/year. That's about 16% of a typical US home's use, or 0.16 homes.
The Physics
Power = ½·ρ·A·v³, where A = π·(d/2)². Doubling the rotor doubles the diameter and quadruples the area; doubling wind speed octuples the power. This is why the chart rises so steeply and why 5 m/s vs 7 m/s is the difference between a novelty and a real contributor.
Frequently Asked Questions
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